I am not sure if anyone has experienced these anywhere else, but it seems the Patriarchate of Jerusalem has solid covers that are used for at least one set of chalice and diskos, which are indeed used liturgically. Just one of the unique things about Sion's liturgics, including the blue festal mantle (http://www.jp-newsga...6-02-11b/05.jpg) and the Taphos emblem on the vestments (http://www.spc.rs/fi.../16/05/18_0.jpg). See the link to the Patriarchate's site below, where these are used at Theophany, 2015:

While the Slav usages has strict rules for the colour of the mandyas, byzantine bishops will wear any colour. So you may well see a byzantine patriarch wearing a red mandyas and a simple bishop a green one -- in other words, the colour has no indication on the rank of the bishop.